﻿/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2009 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * Tool object to manage HTML lists items (UL, OL and LI).
 */

var FCKListHandler =
{
    OutdentListItem : function( listItem )
    {
        var eParent = listItem.parentNode ;

        // It may happen that a LI is not in a UL or OL (Orphan).
        if ( eParent.tagName.toUpperCase().Equals( 'UL','OL' ) )
        {
            var oDocument = FCKTools.GetElementDocument( listItem ) ;
            var oDogFrag = new FCKDocumentFragment( oDocument ) ;

            // All children and successive siblings will be moved to a a DocFrag.
            var eNextSiblings = oDogFrag.RootNode ;
            var eHasLiSibling = false ;

            // If we have nested lists inside it, let's move it to the list of siblings.
            var eChildList = FCKDomTools.GetFirstChild( listItem, ['UL','OL'] ) ;
            if ( eChildList )
            {
                eHasLiSibling = true ;

                var eChild ;
                // The extra () is to avoid a warning with strict error checking. This is ok.
                while ( (eChild = eChildList.firstChild) )
                    eNextSiblings.appendChild( eChildList.removeChild( eChild ) ) ;

                FCKDomTools.RemoveNode( eChildList ) ;
            }

            // Move all successive siblings.
            var eSibling ;
            var eHasSuccessiveLiSibling = false ;
            // The extra () is to avoid a warning with strict error checking. This is ok.
            while ( (eSibling = listItem.nextSibling) )
            {
                if ( !eHasLiSibling && eSibling.nodeType == 1 && eSibling.nodeName.toUpperCase() == 'LI' )
                    eHasSuccessiveLiSibling = eHasLiSibling = true ;

                eNextSiblings.appendChild( eSibling.parentNode.removeChild( eSibling ) ) ;

                // If a sibling is a incorrectly nested UL or OL, consider only its children.
                if ( !eHasSuccessiveLiSibling && eSibling.nodeType == 1 && eSibling.nodeName.toUpperCase().Equals( 'UL','OL' ) )
                    FCKDomTools.RemoveNode( eSibling, true ) ;
            }

            // If we are in a list chain.
            var sParentParentTag = eParent.parentNode.tagName.toUpperCase() ;
            var bWellNested = ( sParentParentTag == 'LI' ) ;
            if ( bWellNested || sParentParentTag.Equals( 'UL','OL' ) )
            {
                if ( eHasLiSibling )
                {
                    var eChildList = eParent.cloneNode( false ) ;
                    oDogFrag.AppendTo( eChildList ) ;
                    listItem.appendChild( eChildList ) ;
                }
                else if ( bWellNested )
                    oDogFrag.InsertAfterNode( eParent.parentNode ) ;
                else
                    oDogFrag.InsertAfterNode( eParent ) ;

                // Move the LI after its parent.parentNode (the upper LI in the hierarchy).
                if ( bWellNested )
                    FCKDomTools.InsertAfterNode( eParent.parentNode, eParent.removeChild( listItem ) ) ;
                else
                    FCKDomTools.InsertAfterNode( eParent, eParent.removeChild( listItem ) ) ;
            }
            else
            {
                if ( eHasLiSibling )
                {
                    var eNextList = eParent.cloneNode( false ) ;
                    oDogFrag.AppendTo( eNextList ) ;
                    FCKDomTools.InsertAfterNode( eParent, eNextList ) ;
                }

                var eBlock = oDocument.createElement( FCKConfig.EnterMode == 'p' ? 'p' : 'div' ) ;
                FCKDomTools.MoveChildren( eParent.removeChild( listItem ), eBlock ) ;
                FCKDomTools.InsertAfterNode( eParent, eBlock ) ;

                if ( FCKConfig.EnterMode == 'br' )
                {
                    // We need the bogus to make it work properly. In Gecko, we
                    // need it before the new block, on IE, after it.
                    if ( FCKBrowserInfo.IsGecko )
                        eBlock.parentNode.insertBefore( FCKTools.CreateBogusBR( oDocument ), eBlock ) ;
                    else
                        FCKDomTools.InsertAfterNode( eBlock, FCKTools.CreateBogusBR( oDocument ) ) ;

                    FCKDomTools.RemoveNode( eBlock, true ) ;
                }
            }

            if ( this.CheckEmptyList( eParent ) )
                FCKDomTools.RemoveNode( eParent, true ) ;
        }
    },

    CheckEmptyList : function( listElement )
    {
        return ( FCKDomTools.GetFirstChild( listElement, 'LI' ) == null ) ;
    },

    // Check if the list has contents (excluding nested lists).
    CheckListHasContents : function( listElement )
    {
        var eChildNode = listElement.firstChild ;

        while ( eChildNode )
        {
            switch ( eChildNode.nodeType )
            {
                case 1 :
                    if ( !eChildNode.nodeName.IEquals( 'UL','LI' ) )
                        return true ;
                    break ;

                case 3 :
                    if ( eChildNode.nodeValue.Trim().length > 0 )
                        return true ;
            }

            eChildNode = eChildNode.nextSibling ;
        }

        return false ;
    }
} ;
